- Lead
- 15,339
- Total
- 32,814
- vs nation
- R+45.3
Idaho 1st State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 11,541
- Total
- 30,348
- vs nation
- R+42.5
- Lead
- 8,947
- Total
- 23,836
- vs nation
- R+39.6
- Lead
- 5,656
- Total
- 21,448
- vs nation
- R+30.2
- Lead
- 3,869
- Total
- 22,336
- vs nation
- R+24.6
- Lead
- 4,767
- Total
- 20,260
- vs nation
- R+21.1
- Lead
- 5,660
- Total
- 16,895
- vs nation
- R+34.0
- Lead
- 1,151
- Total
- 16,977
- vs nation
- R+15.3
Key facts
- 2024 presidential margin
- R+46.7MIT Election Lab
- Population
- 53,6102024 5-year
- Population density
- 19 / sq mi2024 5-year · TIGER/Line
- Land area
- 2,837 sq miTIGER/Line
- Median household income
- $68,4292024 5-year
- White (non-Hispanic)
- 89.4%2024 5-year
- Black
- 0.3%2024 5-year
- Hispanic / Latino
- 3.8%2024 5-year
- Peak Democratic margin
- D+32.7 in 1932MIT Election Lab
- Peak Republican margin
- R+46.7 in 2024MIT Election Lab
- Most similar
- State Senate District 38, MT · twin score 93.5
presidential history
Party record book
Idaho 1st State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1908–2024 · 30 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1932
65.0%
4,949 votes · D+32.7 · modeled estimate
Runner-up · Woodrow Wilson, 1912 · 62.1%
Republican
Donald Trump2024
72.1%
23,675 votes · R+46.7 · modeled estimate
Runner-up · Donald Trump, 2020 · 67.8%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
9,027votes
29.7% of the vote · R+38.0 · modeled estimate
Runner-up · Barack Obama, 2008 · 8,884 votes
Republican
Donald Trump2024
23,675votes
72.1% of the vote · R+46.7 · modeled estimate
Runner-up · Donald Trump, 2020 · 20,568 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Franklin D. Roosevelt1932
+14.9pts D vs U.S.
Place D+32.7 · U.S. D+17.8 · modeled estimate
Runner-up · Adlai Stevenson, 1956 · +11.8 pts
Republican
Donald Trump2024
+45.3pts R vs U.S.
Place R+46.7 · U.S. R+1.5 · modeled estimate
Runner-up · Donald Trump, 2020 · +42.5 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
Its Republican presidential margin was R+46.7 in 2024 and R+17.3 in 2008. About 59,400 residents lived here, with White alone at 88.4% in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 32.7 points in 1932 and a Republican high of 46.7 points in 2024. Between 2020 and 2024 the district moved 8.7 points toward the Republican candidate; the 2024 margin was 46.7 points.
A population of 53,610, a 89% non-Hispanic-white share, and a median household income of $68,429 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 38 and State Senate District 44.
The state-senate districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
Idaho 1st State Senate District. Akashic. https://akashic.app/sld-upper/16001/. Accessed May 20, 2026. License: CC BY 4.0.